1 Department of Hepatobiliary, Pancreatic and Splenic Surgery, The Affiliated Hospital of Inner Mongolia Medical University, #1, Tongdao North Street, Huhhot 010051, PR China. Electronic address: wjx524762202@outlook.com.
2 Department of Hepatobiliary, Pancreatic and Splenic Surgery, The Affiliated Hospital of Inner Mongolia Medical University, #1, Tongdao North Street, Huhhot 010051, PR China. Electronic address: 1005818061@qq.com.
3 UItrasonic Diagnosis Department, The Affiliated Hospital of Inner Mongolia Medical University, #1, Tongdao North Street, Huhhot 010051, PR China. Electronic address: shenwenfeng2009@sina.com.
4 Department of Hepatobiliary, Pancreatic and Splenic Surgery, The Affiliated Hospital of Inner Mongolia Medical University, #1, Tongdao North Street, Huhhot 010051, PR China. Electronic address: renjj.ok@163.com.